defense, but even overall, as the time on the field for our offensive and defensive units has been shown the last two years to be a huge part of success - more offensive positions = more possible points, and shorter defensive possessions keep the defense more fresh and aggressive. It's huge, really. Long sustained drives by the other team have been BYU's nemesis the last 2-3 years, and injuries have played a key role in that. All other positions groups look solid, IMO, with good depth, and key returners, but the group with the most ??? is DT / NT, for sure.
They may surprise, as Nelson has shown to be really good and very aggressive at times when healthy, IMO. I found myself saying, "who was that beast" many times the last 2 years, only to find out the guy who made the aggressive / physical play was Nelson, so I have optimism, especially with the other guys in the 2/4 deep for DT / NT. But our DE's and LB's can't tee it up as much, or even properly fill the gaps, and set the edge, if the DT / NT aren't holding down (or better yet collapsing down) the middle.